Hello,
Nice list for a first attempt!
To my mind, Kalia should be a light deck with some overkill angels, dragons and demons. (like
Master of Cruelties or
Iona, Shield of Emeria)
Otherwise you risk to face an opening hand with too many high cost cards.
So, you want to find these cards when you need them with tutor cards like your
Demonic Tutor, or draw cards.
The deck thus lose some funny splashy things but you get a more subtile one where you can add some removals or utility cards, especially if you play 1 VS 1.
If not, you can indeed add some bigger cards to face multiple opponents.
Hope it helps a little.